PHP Download section ala FilePlanet

Hi,
I am looking for a PHP programmer than can develop something for us.
It is kind of similar to FilePlanets download system.
I will try describing it below:

1. A user wants to download a file, and clicks on the wanted file.
2. A popup window appears and displays a warning message that says you will only get access to a limited amount of resources (as in bandwidth) to download the requested file.
If you sign up, you will get max throughput.
3. if the user dont sign up and choose the "free" server, bandwidth will be limited to 10-20Kbps (or something) and also placed in a queue.


Requirements:
- Users are already registered in an existing MySQL database, so the script must be integrated with this.
- Anti leech. Users cant start multiple downloads. Max one connection per IP or something..
- Easy administration of files and setting. All files are located on the same server, but linking to external files would also be interested. Administration of the queue system must be possible (defining available queue slots etc.).
- A fancy graph displaying bandwidth, how much is used/available etc.


If you see this as a something you could do, please dont hesitate to contact me at URL.
Payment will be discussed then


Regards
Kjetil Kvig

please check our portfolio at URL have got experienced programmers/developers .email me at URL for a quote.